SERVICE MANUAL HWH TOUCH PANEL-CONTROLLED 625S SERIES HYDRAULIC LEVELING SYSTEM. FEATURING: Single Step Touch Panel Leveling Control

Transcription

1 SEVICE MNUL HWH TOUCH PNEL-CONTOL S SEIES HYDULIC LEVELING SYSTEM HWH COPOTION FETUING: Single Step Touch Panel Leveling Control I-XIS Hydraulic Leveling Straight-cting Jacks (Without Dump) (With Dump) (With Pilot Dump) (With emote ocker Switches) HWH COMPUTEIZED LEVELING EXCESS SLOPE UTO LEVEL NOT IN PK/ KE MNUL UTO STOE ETCT ETCT EMEGENCY STOP TVEL MODE CUTION! UNDESTND OPETO S MNUL EFOE USING. LOCK FME ND TIES SECUELY EFOE EMOVING TIES O CWLING UNDE VEHICLE. HWH COPOTION (On I-0, Exit South) 09 Moscow oad Moscow, Iowa 0 Ph: 00/-9 (or) /-9 Fax: /-0 ML0/MI SEP0

2 SECTION SECTION SYSTEM OPETION ND TOULE SHOOTING GUIDE SECTION DIGMS ND GLOSSY PT FOLDE HOW TO USE MNUL This manual is written in two sections. Section is System Operation and Trouble Shooting Steps. Section is the Diagrams and Parts Glossary. egin diagnosis of the system with Section. This will give the correct operation and function of the system. The Trouble Shooting Steps are written in order of operation. The Trouble Shooting Steps should be followed in order to avoid improper diagnosis of the system. Section contains diagrams and a parts glossary. efer to diagrams as directed in the Trouble Shooting Steps. The parts glossary explains the function of individual parts. IMPOTNT: Plumbing and wiring diagrams are generic in nature. efer to specific owner s manuals when available or contact HWH Corporation for specific diagrams when necessary. efore beginning your repair, it is IMPOTNT to read the CUTIONS and NOTES ND CHECKS in the first section, TOULE SHOOTING GUIDE. In many cases this will save time and mistakes when trouble shooting a system. This epair Manual is offered as a guide only. It is impossible to anticipate every problem or combination of problems. For any problems encountered that are not addressed in this manual, contact HWH Corporation for assistance. (00--9) POCEED WITH SYSTEM OPETION MI9. 0NOV

3 TOULE SHOOTING! LOCK FME ND TIES SECUELY EFOE CWLING UNDE VEHICLE. DO NOT USE THE LEVELING JCKS O I SUSPENSION TO SUPPOT VEHICLE WHILE UNDE VEHICLE O CHNGING TIES. VEHICLE MY DOP ND O MOVE FOWD O CKWD WITHOUT CUSING INJUY O DETH. WHEN OUTING O EOUTING HYDULIC HOSES ND WIES, E SUE THEY E NOT EXPOSED TO ENGINE EXHUST O NY HIGH TEMPETUE COMPONENTS OF THE VEHICLE. NEVE PLCE HND O OTHE PTS OF THE ODY NE HYDULIC LEKS. OIL MY CUT ND PENETTE THE SKIN CUSING INJUY O DETH. SFETY CLSSES E TO E WON TO POTECT EYES FOM DIT, METL CHIPS, OIL LEKS, ECT. FOLLOW LL OTHE SHOP SFETY PCTICES. NOTES ND CHECKS ead and check before proceeding with Trouble Shooting Steps. NOTE: HWH COPOTION SSUMES NO LIILITY FO DMGES O INJUIES ESULTING FOM THE INSTLLTION O EPI OF THIS PODUCT.. If the jacks cannot be retracted, see TOULE SHOOTING PT Step for temporary measures. Make sure the manual retract valves are closed before trouble shooting.. The Trouble Shooting Guide must be followed in order. Problems checked for in one step are assumed correct and may not be checked again in following steps.. Check that the oil reservoir is full with the jacks in the fully retracted position. If the vehicle is equipped with HWH room extensions, refer to the HWH Owners Manual for proper position of the room when checking the oil level.. Most coaches have more than one battery; one for the engine and the other(s) for the coach. The engine battery supplies power for the control box and hydraulic pump. atteries under no load should read. volts. atteries must maintain good voltage under load. atteries must be in good condition with no weak cells. n alternator, converter or battery charger will not supply enough power for the system to operate properly.. Proper grounding of all components is critical. See the electrical circuit for specific grounds required. Faulty grounds, especially for the control box, solenoid manifold or the pump assembly, may cause control box component damage and /or improper or erratic operation.. Do not replace the control box unless the epair Steps say to replace it. Otherwise the malfunctions may damage the new control box. This manual is intended for use by experienced mechanics with knowledge of hydraulic and automotive electrical systems. People with little or no experience with HWH leveling systems should contact HWH technical service (00--9) before beginning. Special attention should be given to all cautions, wiring, and hydraulic diagrams. Special note: When installing a new control box, make sure the box is properly grounded before applying power to the system. Tightening of hose ends: If tightening a new hose end, make the hose end snug (finger tight) on the fitting, then tighten the hose end / turn ( FLTS). If tightening an existing hose end, tighten the hose end to snug plus / turn ( FLT). Suggested tools for trouble shooting the HWH leveling systems: JUMPE WIES (UP TO 0 GUGE) GUGE (00 PSI MIN.) MULTI-METE VOLT TEST POCEED WITH THE TOULE SHOOTING STEPS ON THE FOLLOWING PGE MI9. P

4 CONTOL IDENTIFICTION S SEIES LEVELING SYSTEM COMPUTE-CONTOL UTO LEVEL Indicator light "UTO LEVEL" utton "NOT IN PK" Indicator light STOE Indicator light "MNUL DUMP" utton UTO LEVEL "EXCESS SLOPE" Indicator light HWH COMPUTEIZED LEVELING EXCESS SLOPE NOT IN PK/ KE MNUL LOWE Manual button ISE Manual button JCK DOWN Indicator light () red ISE SIDE Manual button "UTO STOE" utton UTO LEVEL/STOE CNCEL utton "TVEL MODE" Indicator light UTO STOE MNUL DUMP ISE SIDE Manual button EMEGENCY STOP LOWE SIDE Manual button TVEL MODE CUTION! ETCT ETCT UNDESTND OPETO S MNUL EFOE USING. LOCK FME ND TIES SECUELY EFOE EMOVING TIES O CWLING UNDE VEHICLE. LOWE SIDE Manual button LEVEL SENSING Indicator light () yellow ISE Manual button LOWE Manual button CONTOL FUNCTIONS "EMEGENCY STOP" UTTON: any leveling system operation. "UTO LEVEL" UTTON: Push this button any time to start the automatic leveling function. "UTO STOE" UTTON: four jacks at the same time. CONTOL UTTONS Push this button to stop Push this button to retract all "MNUL DUMP" UTTON: This is a manual button for dumping air from the vehicle suspension. UTTONS (UP OWS): These buttons will extend their respective jack pairs to lift the vehicle. ETCT UTTONS (DOWN OWS): These buttons will retract their respective jack pairs to lower the vehicle. INDICTO S UTO LEVEL INDICTO : This light will flash during the automatic leveling function. STOE INDICTO : This light will flash during the automatic store function. INDICTO S (CONTINUED) LEVELING S: The four yellow indicating lights are level sensing indicators. When a yellow light is on, it indicates that its side, end, or corner of the vehicle is low. No more than two lights should be on at the same time. When all four yellow LEVEL lights are out, the vehicle is level. SEE OPETO S POCEDUES - UTOMTIC HYDULIC LEVELING FO DETI EXPLNTION. S: The four red lights surrounding the yellow level indicators are jacks down lights. They are functional only when the ignition is in the "ON" or "CC" position, the system is on, and the jacks are extended / to / inch. "EXCESS SLOPE" : This indicator will light when the leveling system cannot level the vehicle. "TVEL MODE" : This indicator light will be on when the ignition is on, when the jacks are retracted and there are no red lights on. "JCKS DOWN" : This is a light mounted in the dash separate from the touch panel. It will be on when any one or more jacks are extended and the ignition is "ON". "NOT IN PK/KE" : This indicator will light when the hand/auto brake is not set and the "UTO LEVEL" button is being pushed. UZZE: This is a jacks down warning. It will sound if the master "JCKS DOWN" warning light is on. MI9. 0UG0

5 SYSTEM OPETION The Single Step leveling system is a computer controlled, I-XIS push button system. This system has automatic or optional manual control. This system will always extend two () jacks at the same time in the automatic or manual mode, both front jacks, the left front and left rear jacks, the right front and right rear jacks or both rear jacks. In the manual mode, the jacks are controlled by the UP and DOWN arrow buttons on the right hand side of the touch panel. The UP arrows extend jack pairs and the DOWN arrows retract jack pairs. ny time the ignition is on, the control box will turn the master relay on. The park brake does not have to be set for the master relay to be on. There are two parts to leveling a vehicle. First the vehicle is leveled. The jacks are used to turn all the yellow level indicators off. The second part of leveling is to stabilize the vehicle. This is accomplished by extending any jacks not used for leveling to the ground and lifting the vehicle between / to / inch. If the vehicle is equipped with an air suspension, the air must be exhausted from the suspension before leveling the vehicle. If the air is not exhausted, the suspension height control valves will interfere with the leveling procedure. There are two types of air dump systems that HWH controls. One system uses air solenoid valves supplied by HWH. The second system is supplied by the chassis manufacturer. This is a pilot air dump system. In the automatic mode, the air is dumped automatically before the leveling process is started. For manual leveling, the HWH touch panel has a "DUMP" button. The "DUMP" button will work if the ignition is on and the park brake is set. If the vehicle uses the HWH air dump valves, the "DUMP" button must be pushed and held until all of the air is exhausted from the vehicle suspension system. The engine must be off. If a pilot air dump system is used, the engine may be on or off. The "DUMP" button can be pushed and released. The pilot air dump system will return to the travel position if the ignition is on and the "STOE" button is pushed or the park brake is released. NOTE: eleasing the park brake to return the suspension to travel mode (vehicle to ride height) is not recommended for normal operation. This is a fail safe if the "STOE" button is not used to retract the jacks. POTECTION: The HWH system has pump protection built into the control box. n up and down timer will turn the pump off and lock the system if a total of minutes is reached. Example: The pump runs for minute and is off for 0 seconds. The pump must run minutes and 0 seconds more without interruption to turn the pump off. ny "OFF" time adds more run time for the pump. This includes operation of HWH rooms. Turn the ignition off, push the "EMEGENCY STOP" button or release the park brake to "UNLOCK" the system. UTOMTIC OPETION The ignition must be in the "ON" or "CC." position and the park brake must be set to use the system. The "TVEL MODE" light will be on and one or two yellow level indicator lights may be on anytime the ignition is in the "ON" or "CC" position. The "NOT IN PK/ KE" indicator light will come on while the "UTO LEVEL" button is being pushed if the park brake signal is not present. The system will not function. Push the "UTO LEVEL" button one time. The UTO LEVEL light will flash. If applicable, the air will dump for thirty (0) seconds before the leveling procedure starts. CUTION: IF THE VEHICLE IS EQUIPPED WITH PILOT I DUMP FO THE SUSPENSION ND UTTON IS PUSHED TO STOP THE UTOMTIC LEVELING POCESS, THE SUSPENSION WILL CONTINUE TO DUMP I. PUSHING THE "STOE" UTTON O ELESING THE PK KE FTE THE LEVELING POCESS IS STOPPED WILL ETUN THE PILOT I DUMP TO THE TVEL POSITION. NOTE: If the vehicle is equipped with remote leveling system rocker switches, pushing a rocker switch to "LEVEL" will start the automatic leveling process. The rocker switch light will flash. On the right hand side of the touch panel there are four () red and four () yellow indicator lights. The four red indicator lights are JCK DOWN warning lights. There is one light for each jack. These warning lights come on when their respective jacks are extended about / to / inch. The four yellow indicator lights are level indicators, front, left side, right side and rear. lit yellow level light indicates that a side, end or corner is low. When all four yellow level lights are out, the vehicle is level within the tolerance of the level sensing unit. The computer will extend jack pairs according to the level lights starting with a lit side light. When all four level lights are out, the computer will extend any jacks not used for leveling to stabilize the vehicle. The computer looks for a jack pressure switch from each jack to know all jacks are on the ground. NOTE: oth front solenoid valves will come on during the stabilize procedure when either front jack pressure switch is not on. When both front jack pressure switches are on, both front solenoid valves will be off. MI9. 0SEP

6 S TOULE SHOOTING GUIDE UTOMTIC OPETIONS CONTINUED... EXCESS SLOPE: Excess slope is when one or two jacks extend as far as they can without turning a yellow level light out. The pump will go to relief and trip a 000# pressure switch on the leveling manifold. The "EXCESS SLOPE" light will come on. Jacks that have not been extended will not extend when the "EXCESS SLOPE" light is on. The "EXCESS SLOPE" light will be on whenever the ignition is on until the park brake is released (with the ignition on) or the jacks are completely retracted with the "STOE" button. The "EMEGENCY STOP" button will stop the automatic leveling process any time. fter pushing the "UTO LEVEL" button to start the automatic leveling process, pushing the "UTO LEVEL" button again or pushing the "STOE" button will stop the automatic leveling process. If the vehicle is equipped with remote leveling system rocker switches, pushing the rocker switch to "LEVEL" or "STOE" will stop the automatic leveling process. MNUL OPETION The ignition must be in the "ON" or "CC." position and the park brake must be set to use the system. The "NOT IN PK/ KE" indicator light will come on while pushing an UP or DOWN arrow manual button if the park brake signal is not present. The system will not function. If applicable, use the DUMP button to dump the air before extending jacks. ir should be completely exhausted from the vehicle suspension before starting a leveling process. On the right hand side of the touch panel there are four () red and four () yellow indicator lights. The four red indicator lights are JCK DOWN warning lights. There is one light for each jack. These warning lights come on when their respective jacks are extended about / to / inch. The four yellow indicator lights are level indicators, front, left side, right side and rear. lit yellow level light indicates that a side, end or corner is low. When all four yellow level lights are out, the vehicle is level within the tolerance of the level sensing unit. Use the UP OW (Extend jack pairs) and DOWN OW (etract jack pairs) buttons to extend jack pairs as needed to level and stabilize the vehicle. Side level lights should be turned off before turning off front or rear level lights. STOE MODE The touch panel has a "STOE" button and light. The ignition must be in the "ON" or "CC." position. The STOE light will come on when the "STOE" button is pushed. The STOE light will go out six () minutes after the last of the four individual red lights go out. If the vehicle is equipped with an air suspension, the leveling system will return to the travel mode when the "STOE" button is pushed. Pushing the "EMEGENCY STOP", the "UTO LEVEL" or "STOE" button after starting the automatic store procedure will halt the automatic store procedure. NOTE: If the vehicle is equipped with remote leveling system rocker switches, pushing the rocker switch to STOE will start the automatic store procedure. Pushing the rocker switch either direction will halt the automatic store procedure. The "STOE" button should always be used to retract the jacks. This allows the system to store any jack that extends due to thermal expansion of the hydraulic fluid while traveling. When traveling, if a jack extends enough to allow a jack warning switch to turn on, the processor will turn the appropriate solenoid valve on so the jack can retract. The master warning light and buzzer will NOT come on at this time. If thirty (0) seconds after the solenoid valve is turned on the warning switch is still on, the processor will turn the master warning light, the buzzer and the appropriate red light on the touch panel on. IMPOTNT: When testing a leveling system, all four sets of UP and DOWN arrow buttons should be used to make sure the complete system operates correctly, including the red lights and the yellow LEVEL lights. If the system will not work in the manual mode it is very unlikely the system will function properly in the automatic mode. : IF THE VEHICLE IS EQUIPPED WITH PILOT I DUMP SYSTEM, THE SUSPENSION WILL DUMP I ND STT TO DOP S SOON S N UTOMTIC LEVEL UTTON O OCKE IS PUSHED. LTHOUGH THE UTOMTIC LEVELING POCEDUE WILL HLT WHEN N "EMEGENCY STOP", "STOE", "UTO LEVEL" O OCKE IS PUSHED, THE VEHICLE SUSPENSION WILL CONTINUE TO DOP. MI9. MY0

7 PK KE F SENSING UNIT PIN +V SIDE SIDE PK KE F F 00 MP TO HWH PILOT I DUMP 9 00 MP + UZZE PILOT I DUMP 00 C C TO HWH TO IGNITION TO CCESSOY _ TO PK KE TOUCH PNEL HWH COMPUTEIZED LEVELING EXCESS SLOPE NOT IN PK/ MNUL KE ETCT ETCT TVEL MODE UTO LEVEL UTO STOE EMEGENCY STOP CUTION! UNDESTND OPETO S MNUL EFOE USING. LOCK FME ND TIES SECUELY EFOE EMOVING TIES O CWLING UNDE VEHICLE. 0 NOTE: FO DETI INPUT / OUTPUT INFOMTION OUT PIN S SEE - CONTOL OX INFOMTION. NOTE: LIT YELLOW INDICTES THEE IS SIGNL TO TUN THE COESPONDING ON. LIT ED INDICTES THEE IS VOLTGE ON IT S COESPONDING OUTPUT PIN. IF YELLOW IS LIT ND THE COESPONDING ED IS OFF, EITHE IT S IS LOWN O THE IS D. IF THE YELLOW S E WOKING UT NO ED IS COMING ON THEE MY E POLEM WITH INPUT VOLTGE IN THE -PIN CONNECTO. F IF YELLOW IS NOT LIT, THEE IS POLEM WITH THE CONTOL OX, TOUCH PNEL O CLE F F TO IGNITION TO CCESSOY UZZE _ TO PK KE C C TOUCH PNEL HWH COMPUTEIZED LEVELING UTO LEVEL UTO STOE F0 ETCT ETCT TVEL EMEGENCY MODE STOP CUTION! UNDESTND OPETO S MNUL EFOE USING. LOCK FME ND TIES SECUELY EFOE EMOVING TIES O CWLING UNDE VEHICLE. 0 EXCESS SLOPE NOT IN PK/ KE PF PF C MNUL 0 - SEE ELECTICL DIGM - SEIES LEVELING SYSTEM - LEVELING MNIFOLD - ND S PIN LD9 -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED 9-YELLOW 0-YELLOW -YELLOW -YELLOW -YELLOW -YELLOW -ED -ED -ED -ED 9-ED 0-YELLOW -GEEN -ED -GEEN -ED -ED -ED -ED -ED 9-ED C C LD LD LD PF CN C C C C C9 CN IGN OUT CN GND UX IGN CL CH CN GND LD Y (SHIELD) PF LD Y Y G G LD Y LD Y LD CN9 F0 PF LD LD T LD CN 00 OWN GEEN PIN PILOT DUMP Y OEM MP.09C 0UG0 DESCIPTION COIL OUTPUT COIL OUTPUT COIL OUTPUT COIL OUTPUT DUMP COIL DUMP OUTPUT COIL OUTPUT COIL OUTPUT TVEL COIL TVEL OUTPUT CX CX WN SW WN SW WN SW WN SW PESS SW PESS SW PESS SW PESS SW NOT USED NOT USED 000 L PESS SW INPUT WN CONTOL 0 L PESS SW INPUT JCK INTEUPT PK KE OD ENLE CCESSOY IN CCESSOY OUT FO LINK S 9 ND 0 (YELLOW) WILL E ON WHENEVE THE TOUCH PNEL IS ON UNLESS THE "STOE" UTTON IS PUSHED. TWO SECONDS FTE THE "STOE" UTTON IS PUSHED, s ND 0 WILL TUN OFF. SECONDS LTE S ND 9 WILL TUN OFF. NOTE: THE TVEL IS WIED S NOMLLY CLOSED. WHEN THE YELLOW () IS ON THE CONTCTS WILL OPEN. THE ED () WILL NOT E ON. THE ED WILL E ON IF THE LEVELING SYSTEM IS IN THE TVEL MODE ND THE IGNITION IS ON. NOTE: THE TVEL IS NOT USED ON VEHICLES EQUIPPED WITH HWH I DUMP SYSTEMS. IT IS ONLY USED WITH PILOT OPETED I DUMP SYSTEMS SEE ELECTICL DIGM - SEIES LEVELING SYSTEM - LEVELING MNIFOLD - ND S PIN 00 OWN GEEN PIN F0-0 MP PF MP.J UG0 MP.J 0UG0 PILOT DUMP Y OEM F - MP F - MP F - MP F - MP F - MP F - MP F - MP F9 - MP MP.09C 0UG0 TOULE SHOOTING STEPS MNUL OPETION NOTE: The following diagnostic functions are written in order of operation and should be checked in this order. Failure to do so may cause improper diagnoses of the problem(s) and increase the time needed to repair the system. PT. WITH THE IGNITION OFF THE HWH TOUCH PNEL SHOULD HVE NO S ON ND SHOULD NOT FUNCTION. SEIES SINGLE STEP LEVELING SYSTEM PILOT I DUMP - PK KE - ND UZZE TOUCH PNEL - JCK S ND ES. If the touch panel has lights on or will function, the red 0 wire in the touch panel harness is connected to a constant power source and should be moved to the "CC." side of the ignition switch. SEE: MP.09C or MP.0J PT. WITH THE IGNITION ON, THE "TVEL MODE" ON THE TOUCH PNEL SHOULD E ON. THE "JCKS DOWN" ND UZZE SHOULD NOT E ON. ONE O TWO YELLOW LEVEL INDICTO S MY E ON IF THE PK KE IS SET, UT NOT OPPOSING LEVEL INDICTO S.. The pump starts to run when the ignition is turned on. Check s (yellow) and (red). SEE: MP.J a. If the red is on but the yellow is off, replace the control box. b. If the yellow and red are on, unplug the touch panel. If the pump stops, replace the touch panel. If the pump continues to run, replace the control box. c. If s and are off, replace the pump relay. The pump relay contacts are stuck. SEE: MP.J. The "TVEL MODE" light is not on. The ignition is on, the master "JCKS DOWN" warning light and buzzer are on and none of the jacks are extended. C MP.09C O MP.0J CONTOL OX - - LOCTION ND DESCIPTION DUMP CX TVEL F F9 CX MP.J a. Check the four yellow s for the warning switch inputs in the control box. Number is for the left front jack, is for the right front jack, is for the right rear jack and is for the left rear jack. If no warning switch s are on, replace the control box. SEE: MP.J b. If a warning switch is on, unplug the warning switch for the jacks that have a lit. If the s go out, the problem is the warning switch. NOTE: The magnet in the jack may be bad. If a new switch does not fix the problem, contact HWH customer service. If the stays on with the warning switch unplugged, unplug the pin gray connector from the back of the control box. If the remains on, replace the control box. If the goes out, the warning switch wire(s) for the s that are on are shorted to ground. SEE: MP.09C NOTE: Make sure the white wires of the harness and warning switch are in the "" pins of the Packard connectors. The black wires must be in the "" pins of the connectors.. The "TVEL MODE" light is not on. The ignition is on, the master "JCKS DOWN" warning light and buzzer are NOT on and none of the jacks are extended. Push the "UTO LEVEL" button. The UTO LEVEL light should flash. If the light flashes, replace the touch panel. If the touch panel remains off with no s lit, check s, and 9. 9 should be flashing. SEE: MP.J a. s, and 9 are off. Check fuse F0. If F0 is blown, check the 00 wire in the touch panel harness, it may be shorted to ground. If the 00 wire is ok, replace the control box. If F0 is OK, check for + volts between PIN (gnd) and PIN (ign) of CN. If + is present, replace the control box. If + is not present, check for + between T and PIN (ign) of CN. If voltage is present, replace the control box. If + is not present, the problem is either the ground for the control box in the pin gray connector or + ignition power on wire 0, PIN of CN. Voltage to the control box on the 0 wire should be above volts. SEE: MP.J CICUIT OD CONNECTO ND PIN LOCTIONS GND SEIES SINGLE STEP LEVELING SYSTEM PILOT I DUMP - PK KE - ND UZZE TOUCH PNEL - JCK S ND ES LD LD LD LD LD0 LD9 MP.09C LD + MP.J MI9.9 0OCT

8 PIN # LINK WIE COLO PIN MT CONNECTO YELLOW GEEN WHITE ED PIN UML CONNECTO UTO LEVEL NOT IN PK/ KE UTO MNUL STOE DUMP ETCT TVEL EMEGENCY MODE STOP SECUELY EFOE EMOVING TIES O CWLING UNDE VEHICLE. UNDESTND OPETO S MNUL EFOE USING. LOCK FME ND TIES PIN WIE NUME MP 0 + EXCESS SLOPE CCESSOY STOE LEVEL TO 0 L - 0 LEVELING MNIFOLD TO HWH - 0 TO 000 L - 00 MOTO LEVELING MNIFOLD + C CN P.E.D P.E.D P.E.D P.E.D HWH #9 C TO MOTO # # C PF 00 UZZE C PK KE TO PK KE TO IGNITION TO CCESSOY _ C0 C LD Y LD Y LD Y LD Y LD LD LD LD CN F LF L TOUCH PNEL HWH COMPUTEIZED LEVELING EXCESS SLOPE UTO LEVEL NOT IN PK/ MNUL KE UTO STOE ETCT ETCT TVEL EMEGENCY MODE STOP CUTION! UNDESTND OPETO S MNUL EFOE USING. LOCK FME ND TIES SECUELY EFOE EMOVING TIES O CWLING UNDE VEHICLE. 0 C C # # MNUL ETCT PIN PIN T WIE DESCIPTION ND FUNCTION CN HIGH CN LOW CN SHIELD FOM CONTOL OX ED TTEY FOM CONTOL OX +V CC FOM TOUCH PNEL SW +V FOM SW TO TOUCH PNEL FO STOE SW GND FOM TOUCH PNEL FO LEVEL SW +V FOM SW TO TOUCH PNEL FO LEVEL MP.90 FE0 LD9 LD LD LD # # C C9 CN9 00 C IGN OUT PIN CN GND IGN CL CH CN GND (SHIELD) PF Y G G SEE ELECTICL DIGM - SEIES LEVELING SYSTEM - LEVELING MNIFOLD - ND S PIN CN F TO HWH TO HOUSE TTEY # # PF OWN 00 OWN GEEN PIN PIN MP.J 0UG0 TOUCH PNEL HNESS MP.0K JUN0 PILOT DUMP Y OEM TOULE SHOOTING STEPS MNUL OPETION PT. Continued... b. s and are on, 9 is off. Check for + volts between PIN (ground-white wire) and PIN (+-red wire) at the touch panel. Less than. volts at the touch panel may indicate that there is a low voltage situation for the leveling system but the system may still functions. If there is less than volts at the touch panel, the voltage problem should be taken care of before proceeding. If there is a voltage problem, check the voltage between PIN (gnd) and PIN (ign) of CN at the control box and PIN (gnd) and PIN (ign out) of CN. If there is more than (one) volt difference, replace the control box. If voltage between PIN and PIN is low, the problem is the ground from the white wire in the pin gray connector or the voltage on the red 0 wire in the CN connector for PIN. SEE: MP.90 & MP.J If there is good voltage between PIN and PIN at the touch panel, check the link light at the touch panel. If it is blinking, the touch panel is probably the problem. If the link light is not blinking check the resistance between PIN (yellow wire) and PIN (green wire) at the touch panel with the harness plugged in. The ignition must be off when checking resistance on these wires. NOTE: If the vehicle is a towable vehicle or the control box is not wired to the ignition circuit, remove power from the 0 wire in the PIN black connector CN. There should be 0 ohms of resistance ±. ohms. If the resistance is OK, the problem is probably the control box but could be the touch panel. If the resistance is not correct, unplug the harness from the touch panel. Check the resistance between the yellow and green wire in the harness plug and between PIN and PIN of the panel plug. The resistance should be 0 ohms ± ohms. If the resistance between the panel pins is wrong, replace the touch panel. If the resistance between the harness pins is wrong, unplug the touch panel cable (CN- pin black connector) at the control box. Check the resistance between PIN (CL) and PIN (CH) of CN in the control box. If the resistance is OK (0 ohms ± ohms), replace the touch panel cable. If not replace the control box. SEE: MP.90 & MP.J TOUCH PNEL S HWH COMPUTEIZED LEVELING CUTION! MP.90 CICUIT OD CONNECTO ND PIN LOCTIONS GND LD LD LD LD LD0 LD9 MP.J LD + UX If there is no voltage between PIN and PIN at the touch panel, check for voltage between pins (ign out) and (gnd) of CN at the control box. If there is good voltage, the problem is the touch panel cable or it s connections. If there is no voltage between pins and, check for voltage on the legs of poly fuse PF. If there is no voltage on either leg, replace the control box. If there is voltage on one leg of the poly fuse, unplug the touch panel cable at the touch panel and recheck pins and. (It will take about 0 seconds for the poly fuse to reset). If voltage is now present, replace the touch panel. If there is still no voltage, remove the 00 wire from the CN connector and recheck pins and. If there is voltage now, the 00 wire is shorted to ground. If voltage is still not present, replace the control box. SEE: MP.90 & MP.J & MP.0K c. is on. is off. 9 may or may not be on, blinking. Check voltage between PIN (gnd) and PIN (ign) of CN at the control box. If there is less than volts present, check the ground and ignition supply connections for any problems including corrosion. If there is good voltage between pins and, replace the control box. SEE: MP.J. The "TVEL MODE" light is on ND the master "JCKS DOWN" warning light and buzzer are on. LEVELING MNIFOLD ND S MP.0K a. Check red. If the is on, replace the control box. SEE: MP.J If the is not on, the wire going to the master warning light and buzzer is shorted to ground. SEE: MP.09C or MP.0 or MP.0J. Opposing yellow level indicator light are on. a. If the rest of PT is OK, proceed to PT if the vehicle is equipped with an air suspension or PT if not equipped with an air suspension. Opposing yellow lights are covered in PT. SEIES SINGLE STEP LEVELING SYSTEM PILOT I DUMP - PK KE - ND UZZE TOUCH PNEL - JCK S ND ES MP.09C MI9.0 OCT0

9 PIN # F SENSING UNIT PIN +V SIDE SIDE F F 9 C0 C C C C CN C PF PIN CONNECTO WHITE 0 ED 00 OWN CONNECTO CONNECTO THU THU 0 PIN CONNECTO ND ED 00 WHITE 0 ED 0 GEEN YELLOW CONNECTO ND WHITE MP NOTE: FO DETI INPUT / OUTPUT INFOMTION OUT PIN S SEE - CONTOL OX INFOMTION. NOTE: LIT YELLOW INDICTES THEE IS SIGNL TO TUN THE COESPONDING ON. LIT ED INDICTES THEE IS VOLTGE ON IT S COESPONDING OUTPUT PIN. IF YELLOW IS LIT ND THE COESPONDING ED IS OFF, EITHE IT S IS LOWN O THE IS D. IF THE YELLOW S E WOKING UT NO ED IS COMING ON THEE MY E POLEM WITH INPUT VOLTGE IN THE -PIN CONNECTO. F IF YELLOW IS NOT LIT, THEE IS POLEM WITH THE CONTOL OX, TOUCH PNEL O CLE PK KE 0 F 00 MP F F C C C C9 CN IGN OUT GND UX IGN CL CH CN GND LD Y (SHIELD) PF LD Y Y G G LD Y LD Y LD CN9 F0 PF LD LD T LD CN 0 9 TO HWH PILOT I DUMP SENSING UNIT PIN +V SIDE SIDE WIE COLO F F UZZE TO IGNITION C F0 TO CCESSOY _ TO PK KE NOTE: FO DETI INPUT / OUTPUT INFOMTION OUT PIN S SEE - CONTOL OX INFOMTION. NOTE: LIT YELLOW INDICTES THEE IS SIGNL TO TUN THE COESPONDING ON. IF YELLOW IS LIT ND THE COESPONDING ED IS OFF, EITHE IT S IS LOWN O THE IS D. IF THE YELLOW S E WOKING UT NO ED IS COMING ON THEE MY E POLEM WITH INPUT VOLTGE IN THE -PIN CONNECTO. F EXCESS SLOPE UTO STOE TVEL EMEGENCY MODE STOP LIT ED INDICTES THEE IS VOLTGE ON IT S COESPONDING OUTPUT PIN. IF YELLOW IS NOT LIT, THEE IS POLEM WITH THE CONTOL OX, TOUCH PNEL O CLE F F 9 PIN PIN PIN PIN PIN PIN WIE NUME 0 9 F F9 0 PIN PF PF LD9 TOUCH PNEL UTO LEVEL HWH COMPUTEIZED LEVELING NOT IN PK/ KE ETCT CUTION! UNDESTND OPETO S MNUL EFOE USING. LOCK FME ND TIES SECUELY EFOE EMOVING TIES O CWLING UNDE VEHICLE. F0 PF PF -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED 9-YELLOW 0-YELLOW -YELLOW -YELLOW -YELLOW -YELLOW -ED -ED -ED -ED 9-ED 0-YELLOW -GEEN -ED -GEEN -ED -ED -ED -ED -ED 9-ED C LD LD LD OWN PIN PIN PIN PIN PIN CN DESCIPTION COIL OUTPUT COIL OUTPUT COIL OUTPUT COIL OUTPUT DUMP COIL DUMP OUTPUT COIL OUTPUT COIL OUTPUT TVEL COIL TVEL OUTPUT CX CX WN SW WN SW WN SW WN SW PESS SW PESS SW PESS SW PESS SW NOT USED NOT USED 000 L PESS SW INPUT WN CONTOL 0 L PESS SW INPUT JCK INTEUPT PK KE OD ENLE CCESSOY IN CCESSOY OUT FO LINK MP.J 0UG0 ED +V TTEY POWE FOM ED +V TTEY POWE FOM FOM HWH + TTEY FOM CONTOL - ED L - ED 0 L - ED ED + FO TVEL ED + FO SOLENOID VLVE FO SOLENOID VLVE FO SOLENOID VLVE ED + FO SOLENOID VLVE ED + FO SOLENOID VLVE ED + FO SOLENOID VLVE ED + FO DUMP CONTOL - ED + ED FOM PK KE UZZE & CONTOL - ED ED TTEY CN SHIELD + CCESSOY / IGNITION CN LOW CN HIGH ED FOM ED FOM ED FOM ED FOM ED FOM ED FOM ED FOM ED FOM SHED FO ES MP.E UG0 F - MP F - MP F - MP F - MP F - MP F - MP F - MP F9 - MP F0-0 MP PF S 9 ND 0 (YELLOW) WILL E ON WHENEVE THE TOUCH PNEL IS ON UNLESS THE "STOE" UTTON IS PUSHED. TWO SECONDS FTE THE "STOE" UTTON IS PUSHED, s ND 0 WILL TUN OFF. SECONDS LTE S ND 9 WILL TUN OFF. NOTE: THE TVEL IS WIED S NOMLLY CLOSED. WHEN THE YELLOW () IS ON THE CONTCTS WILL OPEN. THE ED () WILL NOT E ON. THE ED WILL E ON IF THE LEVELING SYSTEM IS IN THE TVEL MODE ND THE IGNITION IS ON. NOTE: THE TVEL IS NOT USED ON VEHICLES EQUIPPED WITH HWH I DUMP SYSTEMS. IT IS ONLY USED WITH PILOT OPETED I DUMP SYSTEMS. MNUL ETCT -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED -YELLOW -ED 9-YELLOW 0-YELLOW -YELLOW -YELLOW -YELLOW -YELLOW -ED -ED -ED -ED 9-ED 0-YELLOW -GEEN -ED -GEEN -ED -ED -ED -ED -ED 9-ED WIE DESCIPTION ND FUNCTION PIN 000 OWN GEEN PIN MP.J UG PILOT DUMP 0 - Y OEM SEE ELECTICL DIGM - SEIES LEVELING SYSTEM - LEVELING MNIFOLD - ND S DESCIPTION COIL OUTPUT COIL OUTPUT COIL OUTPUT COIL OUTPUT DUMP COIL DUMP OUTPUT COIL OUTPUT COIL OUTPUT TVEL COIL TVEL OUTPUT CX CX WN SW WN SW WN SW WN SW PESS SW PESS SW PESS SW PESS SW NOT USED NOT USED 000 L PESS SW INPUT WN CONTOL 0 L PESS SW INPUT JCK INTEUPT PK KE OD ENLE CCESSOY IN CCESSOY OUT FO LINK 00 MP.09C 0UG0 F - MP F - MP F - MP F - MP F - MP F - MP F - MP F9 - MP F0-0 MP PF S 9 ND 0 (YELLOW) WILL E ON WHENEVE THE TOUCH PNEL IS ON UNLESS THE "STOE" UTTON IS PUSHED. TWO SECONDS FTE THE "STOE" UTTON IS PUSHED, s ND 0 WILL TUN OFF. SECONDS LTE S ND 9 WILL TUN OFF. NOTE: THE TVEL IS WIED S NOMLLY CLOSED. WHEN THE YELLOW () IS ON THE CONTCTS WILL OPEN. THE ED () WILL NOT E ON. THE ED WILL E ON IF THE LEVELING SYSTEM IS IN THE TVEL MODE ND THE IGNITION IS ON. NOTE: THE TVEL IS NOT USED ON VEHICLES EQUIPPED WITH HWH I DUMP SYSTEMS. IT IS ONLY USED WITH PILOT OPETED I DUMP SYSTEMS. MP.J UG0 TOULE SHOOTING STEPS MNUL OPETION PT. FO VEHICLES EQUIPPED WITH N I SUSPENSION. THE I WILL NOT EXHUST FOM THE SUSPENSION I GS WHEN THE "DUMP" UTTON ON THE TOUCH PNEL IS PUSHED. THE IGNITION IS ON ND THE PK KE IS SET.. The "NOT IN PK/KE" light on the touch panel comes on while the "DUMP" button is being pushed. CICUIT OD CONNECTO ND PIN LOCTIONS + GND a. Check that the park brake is set. b. Check on the board in the control box. SEE: MP.J LD LD LD LD LD0 LD9 LD If is off, check for a ground on the wire on pin of the pin black connector on the back of the control box. If there is a ground on wire, unplug the pin black connector and ground pin in the box receptacle. If does not come on, replace the control box. If does come on the problem is wire or the pin black connection. If there is no ground on wire, the problem is wire or the park brake switch. SEE: MP.J & MP.E. For vehicles equipped with the HWH air dump valves. There is normally one air dump valve for each height control valve on the suspension. ir will only be exhausted while the "DUMP" button is being pushed. a. Check s,, and while the "DUMP" button is being pushed. s and (YELLOW) along with (ED) should be on. (ED) should be off. If s and/or are not on, or is on, replace the control box. If is on but is off, check fuse F. If F is not blown, push any manual UP arrow button. If the pump runs, check for power on the two black wires in the four pin connector on the back of the control box. If power is present, replace the control box. If power is not present, there is a problem with these wires or their connection to the master relay. If the pump does not run, proceed to PT. If F is blown, there may be a short on the 900 wire going to the HWH air dump valves or one or more of the air dump valves may be bad. SEE: MP.J & MP.09C b. s and (YELLOW) and (ED) are on. is off. There should be power on the 900 wire on pin in the pin brown connector on the back of control box. If not, there is a problem with the connector, pin connections or the 900 wire. If there is power on the 900 wire at the control box, check for power between the 900 () wire and the white wire in the Packard connector at the air dump valves. If there is no power, the problem is the 900 wire, the white ground wire or their pin connections. If power is present at the connectors, replace the air dump valve(s). Check that the exhaust ports for the air dump valves are not plugged. SEE: MP.J & MP.09C. For vehicles equipped with a pilot air dump system supplied by the chassis manufacturer and controlled electronically by the HWH leveling system. The "DUMP" button may be pushed and released. The pilot valve should shift to the dump position and remain there. a. Check s,, and while the "DUMP" button is being pushed. s and (YELLOW) along with (ED) should be on. (ED) should be off. If s and/or are not on, or is on, replace the control box. If is on but is off, check fuse F. If F is not blown, push any manual UP arrow button. If the pump runs, check for power on the two black wires in the four pin connector on the back of the control box. If power is present, replace the control box. If power is not present, there is a problem with these wires or their connection to the master relay. If the pump does not run, proceed to PT. If F is blown, there may be a short on the 900 wire or a problem with the suspension pilot dump valve. Locate the pin UML connector in the HWH harness. Unplug the pin connector. eplace the F fuse and retry. If the fuse blows again, the problem is with the HWH 900 wire. If the fuse does not blow, the problem is with the pilot dump valve. Contact the vehicle manufacturer for assistance. SEE: MP.J & MP.09C MP.J MP.E CONTOL OX - - LOCTION ND DESCIPTION DUMP CX TVEL F F9 CX MP.J SEIES SINGLE STEP LEVELING SYSTEM PILOT I DUMP - PK KE - ND UZZE TOUCH PNEL - JCK S ND ES MP.09C CONTOL OX - - LOCTION ND DESCIPTION DUMP CX CONTOL OX INFOMTION TVEL CX MP.J MI9. UG0

10 F 9 0 SENSING UNIT PIN +V SIDE SIDE 9 NOTE: FO DETI INPUT / OUTPUT INFOMTION OUT PIN S SEE - CONTOL OX INFOMTION. NOTE: LIT YELLOW INDICTES THEE IS SIGNL TO TUN THE COESPONDING ON. LIT ED INDICTES THEE IS VOLTGE ON IT S COESPONDING OUTPUT PIN. IF YELLOW IS LIT ND THE COESPONDING ED IS OFF, EITHE IT S IS LOWN O THE IS D. IF THE YELLOW S E WOKING UT NO ED IS COMING ON THEE MY E POLEM WITH INPUT VOLTGE IN THE -PIN CONNECTO. IF YELLOW IS NOT LIT, THEE IS POLEM WITH THE CONTOL OX, TOUCH PNEL O CLE TOUCH PNEL HWH COMPUTEIZED LEVELING EXCESS SLOPE UTO LEVEL NOT IN PK/ MNUL KE UTO STOE ETCT ETCT TVEL EMEGENCY MODE STOP CUTION! UNDESTND OPETO S MNUL EFOE USING. LOCK FME ND TIES SECUELY EFOE EMOVING TIES O CWLING UNDE VEHICLE TO IGNITION TO CCESSOY MP UZZE 00 + _ 0 PK KE TO PK KE TO HWH F F F F F 9 PILOT I DUMP 9 F F F SENSING UNIT PIN +V SIDE SIDE 9 NOTE: FO DETI INPUT / OUTPUT INFOMTION OUT PIN S SEE - CONTOL OX INFOMTION. NOTE: LIT YELLOW INDICTES THEE IS SIGNL TO TUN THE COESPONDING ON. LIT ED INDICTES THEE IS VOLTGE ON IT S COESPONDING OUTPUT PIN. IF YELLOW IS LIT ND THE COESPONDING ED IS OFF, EITHE IT S IS LOWN O THE IS D. IF THE YELLOW S E WOKING UT NO ED IS COMING ON THEE MY E POLEM WITH INPUT VOLTGE IN THE -PIN CONNECTO. F IF YELLOW IS NOT LIT, THEE IS POLEM WITH THE CONTOL OX, TOUCH PNEL O CLE PIN # WIE COLO F F F F9 F F9 PIN PIN PIN PIN PIN PIN WIE NUME 0 0 F0 F0 PF PF PF PF -YELLOW COIL -ED OUTPUT -YELLOW COIL -ED OUTPUT -YELLOW COIL -ED OUTPUT -YELLOW COIL -ED OUTPUT -YELLOW DUMP COIL -ED DUMP OUTPUT -YELLOW COIL -ED OUTPUT -YELLOW COIL -ED OUTPUT -YELLOW TVEL COIL -ED TVEL OUTPUT 9-YELLOW CX 0-YELLOW CX -YELLOW WN SW -YELLOW WN SW -YELLOW WN SW -YELLOW WN SW -ED PESS SW -ED PESS SW -ED PESS SW -ED PESS SW 9-ED NOT USED 0-YELLOW NOT USED -GEEN 000 L PESS SW INPUT -ED WN CONTOL -GEEN 0 L PESS SW INPUT -ED JCK INTEUPT -ED PK KE -ED OD ENLE -ED CCESSOY IN -ED CCESSOY OUT FO 9-ED LINK S 9 ND 0 (YELLOW) WILL E ON WHENEVE THE TOUCH PNEL IS ON UNLESS THE "STOE" UTTON IS PUSHED. TWO SECONDS FTE THE "STOE" UTTON IS PUSHED, s ND 0 WILL TUN OFF. SECONDS LTE S ND 9 WILL TUN OFF. NOTE: THE TVEL IS WIED S NOMLLY CLOSED. WHEN THE YELLOW () IS ON THE CONTCTS WILL OPEN. THE ED () WILL NOT E ON. THE ED WILL E ON IF THE LEVELING SYSTEM IS IN THE TVEL MODE ND THE IGNITION IS ON. NOTE: THE TVEL IS NOT USED ON VEHICLES EQUIPPED WITH HWH I DUMP SYSTEMS. IT IS ONLY USED WITH PILOT OPETED I DUMP SYSTEMS. MP.J UG0 DESCIPTION SEE ELECTICL DIGM - SEIES LEVELING SYSTEM - LEVELING MNIFOLD - ND S PIN 00 OWN GEEN PIN F - MP F - MP F - MP F - MP F - MP F - MP F - MP F9 - MP F0-0 MP PF PILOT DUMP Y OEM MP.09C 0UG0 DESCIPTION -YELLOW COIL -ED OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW DUMP COIL -ED DUMP OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW TVEL COIL -ED TVEL OUTPUT F9 - MP 9-YELLOW CX 0-YELLOW CX -YELLOW WN SW -YELLOW WN SW -YELLOW WN SW -YELLOW WN SW -ED PESS SW -ED PESS SW -ED PESS SW -ED PESS SW 9-ED NOT USED 0-YELLOW NOT USED -GEEN 000 L PESS SW INPUT -ED WN CONTOL -GEEN 0 L PESS SW INPUT -ED JCK INTEUPT -ED PK KE -ED OD ENLE -ED CCESSOY IN F0-0 MP -ED CCESSOY OUT FO PF 9-ED LINK S 9 ND 0 (YELLOW) WILL E ON WHENEVE THE TOUCH PNEL IS ON UNLESS THE "STOE" UTTON IS PUSHED. TWO SECONDS FTE THE "STOE" UTTON IS PUSHED, s ND 0 WILL TUN OFF. SECONDS LTE S ND 9 WILL TUN OFF. NOTE: THE TVEL IS WIED S NOMLLY CLOSED. WHEN THE YELLOW () IS ON THE CONTCTS WILL OPEN. THE ED () WILL NOT E ON. THE ED WILL E ON IF THE LEVELING SYSTEM IS IN THE TVEL MODE ND THE IGNITION IS ON. NOTE: THE TVEL IS NOT USED ON VEHICLES EQUIPPED WITH HWH I DUMP SYSTEMS. IT IS ONLY USED WITH PILOT OPETED I DUMP SYSTEMS. MP.J UG0 OWN PIN PIN PIN PIN PIN WIE DESCIPTION ND FUNCTION PIN CONNECTO 00 ED +V TTEY POWE FOM 00 ED +V TTEY POWE FOM WHITE 0 FOM HWH ED 00 + TTEY FOM OWN CONNECTO 00 CONTOL - ED L - ED 0 0 L - ED 90 ED + FO TVEL 00 ED + FO SOLENOID VLVE 00 FO SOLENOID VLVE 0 FO SOLENOID VLVE 00 ED + FO SOLENOID VLVE 9 00 ED + FO SOLENOID VLVE 0 00 ED + FO SOLENOID VLVE 900 ED + FO DUMP 00 CONTOL - ED + CONNECTO THU ED FOM PK KE THU 0 UZZE & CONTOL - ED PIN CONNECTO ND ED 00 ED TTEY WHITE 0 CN SHIELD ED 0 + CCESSOY / IGNITION GEEN CN LOW YELLOW CN HIGH CONNECTO ND 000 ED FOM 000 ED FOM 00 ED FOM 00 ED FOM 00 ED FOM 00 ED FOM ED FOM ED FOM WHITE SHED FO ES MP.E MP.0 UG PIN TO 0 L - 0 LEVELING MNIFOLD TO HWH - 0 TO 000 L - 00 MOTO LEVELING MNIFOLD + P.E.D P.E.D P.E.D P.E.D HWH #9 TO MOTO # # 00 F LF L # # # # 00 PIN 0 - TO HWH 00 TO HOUSE TTEY # # OWN PIN TOUCH PNEL HNESS MP.0K JUN0 TOULE SHOOTING STEPS MNUL OPETION PT. Continued... b. s and (YELLOW) and (ED) are on and (ED) is off. Find the pin UML plug for the pilot dump in the HWH harness. While pushing the "DUMP" button, check between the pins in the pin UML connector for the black 900 wire and the white ground wire. If there is no power on the 900 wire, the problem is the 900 wire, the white ground wire or their connections. If there is power on the 900 wire, the problem is the suspension pilot dump valve. Contact the vehicle manufacturer for assistance. SEE: MP.J & MP.09C The following steps, through check the operation of the manual extend (up arrow) and retract (down arrow) buttons. This should be done before checking the automatic function of the system. The manual buttons operate jack pairs. Each set of extend and retract buttons should be checked. Take care not to twist the vehicle. The jack warning switches and the level sensor are also checked in these steps. Make sure all parts of the leveling system function during manual operations before proceeding to the automatic operation section of the manual. CONTOL OX - - LOCTION ND DESCIPTION DUMP CX TVEL CX MP.J SEIES SINGLE STEP LEVELING SYSTEM PILOT I DUMP - PK KE - ND UZZE TOUCH PNEL - JCK S ND ES PT. THE WILL NOT UN WHEN N UP OW () UTTON IS PUSHED. THE NOT IN PK/KE COMES ON WHILE PUSHING THE UP OW.. Check that the park brake is set. C. Check on the board in the control box. should be on. a. If is on, that indicates there is a signal from the park brake switch. The problem is the control box. eplace the control box. SEE: MP.J b. If is off, check for a ground on the wire on pin of the pin black connector on the back of the control box. If there is a ground on wire, unplug the pin black conector and ground pin in the box recepticle. If does not come on, replace the control box. If does come on the problem is wire or the pin black connection. If there is no ground on wire, the problem is wire or the park brake switch. SEE: MP.J or MP.E PT. THE WILL NOT UN O UNS ETICLLY WHEN N UP OW () UTTON IS PUSHED. THE "NOT IN PK/KE" DOES NOT COME ON.. If the pump will not run when one or more UP OWS are pushed but other UP OWS will run the pump, replace the touch panel.. Check s (YELLOW), (ED), (YELLOW), (ED) and (ED) while an UP OW is being pushed. ll five s should be lit. If all five s are lit, proceed to #. SEE: MP.J NOTE: should be on constant if the ignition is on and the park brake is set. a. If (red) is not lit, refer to PT - section c. b. If either yellow is not lit, replace the control box. If both yellow s are lit, both red s should be lit. (Check while pushing an UP arrow.) MP.09C CONTOL OX - - LOCTION ND DESCIPTION DUMP CX TVEL CX MP.J CONTOL OX INFOMTION MP.E LEVELING MNIFOLD ND S c. If red is not lit, check fuse F. If F is OK, replace the control box. If F is blown, the 00 wire going to the master relay is shorted to ground or the master relay is bad. Wire 00 is in pin in the pin brown connector on the back of the control box. Disconnect this wire from the master relay, replace the fuse and retry. If the fuse only blows with the 00 wire connected to the master relay, the master relay is bad. SEE: MP.J & MP.0K d. If red is not lit, check fuse F. If F is OK, replace the control box. If F is blown, the 00 wire going to the pump relay is shorted to ground or the pump relay is bad. Wire 00 is on pin in the pin brown connector on the back of the control box. Disconnect this wire from the pump relay, replace the fuse and retry. If the fuse only blows with the 00 wire connected to the pump relay, the pump relay is bad. SEE: MP.J & MP.0K or MP.0 or MP.0 MP.0K MI9. 0DEC

11 F SENSING UNIT PIN +V SIDE SIDE F F 9 NOTE: FO DETI INPUT / OUTPUT INFOMTION OUT PIN S SEE - CONTOL OX INFOMTION. NOTE: LIT YELLOW INDICTES THEE IS SIGNL TO TUN THE COESPONDING ON. LIT ED INDICTES THEE IS VOLTGE ON IT S COESPONDING OUTPUT PIN. IF YELLOW IS LIT ND THE COESPONDING ED IS OFF, EITHE IT S IS LOWN O THE IS D. IF THE YELLOW S E WOKING UT NO ED IS COMING ON THEE MY E POLEM WITH INPUT VOLTGE IN THE -PIN CONNECTO. F 9 0 IF YELLOW IS NOT LIT, THEE IS POLEM WITH THE CONTOL OX, TOUCH PNEL O CLE F F F F9 0 9 TO 0 L - 0 MOTO LEVELING MNIFOLD + P.E.D P.E.D P.E.D P.E.D TO HWH - 0 TO 000 L - 00 HWH - TO HWH #9 TO MOTO # # 00 F0 PF PF LEVELING MNIFOLD F LF L NOTE: OOM EXTENSION MNIFOLD NOT SHOWN DESCIPTION -YELLOW COIL -ED OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW DUMP COIL -ED DUMP OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW COIL -ED OUTPUT F - MP -YELLOW TVEL COIL -ED TVEL OUTPUT F9 - MP 9-YELLOW CX 0-YELLOW CX -YELLOW WN SW -YELLOW WN SW -YELLOW WN SW -YELLOW WN SW -ED PESS SW -ED PESS SW -ED PESS SW -ED PESS SW 9-ED NOT USED 0-YELLOW NOT USED -GEEN 000 L PESS SW INPUT -ED WN CONTOL -GEEN 0 L PESS SW INPUT -ED JCK INTEUPT -ED PK KE -ED OD ENLE -ED CCESSOY IN F0-0 MP -ED CCESSOY OUT FO PF 9-ED LINK S 9 ND 0 (YELLOW) WILL E ON WHENEVE THE TOUCH PNEL IS ON UNLESS THE "STOE" UTTON IS PUSHED. TWO SECONDS FTE THE "STOE" UTTON IS PUSHED, s ND 0 WILL TUN OFF. SECONDS LTE S ND 9 WILL TUN OFF. NOTE: THE TVEL IS WIED S NOMLLY CLOSED. WHEN THE YELLOW () IS ON THE CONTCTS WILL OPEN. THE ED () WILL NOT E ON. THE ED WILL E ON IF THE LEVELING SYSTEM IS IN THE TVEL MODE ND THE IGNITION IS ON. NOTE: THE TVEL IS NOT USED ON VEHICLES EQUIPPED WITH HWH I DUMP SYSTEMS. IT IS ONLY USED WITH PILOT OPETED I DUMP SYSTEMS. MP.J UG PIN 0 - TO HWH TO +V TTEY # # # # # # SEE ELECTICL DIGM SEIES LEVELING SYSTEM - I DUMP TO HWH OWN PIN MP.0 P0 TOULE SHOOTING STEPS MNUL OPETION PT. Continued.... s (YELLOW), (ED), (YELLOW), (ED) and (ED) are lit when an UP OW is being pushed. The problem is with the relays or the pump motor. SEE: MP.J IMPOTNT: THE DEFINITION OF POWE IS 0.0 VOLTS O MOE T THE ND S WITH s,, ND ON. a. Terminals,,,,, and 9 should all have power when above s are lit. Terminals and should be connected to the ground stud on the side of the pump. Make sure all terminals are tight and that the wires, ring terminals and the relay terminals are free of corrosion. SEE: MP.0 or MP.0K or MP.0 b. If terminal has no power, the problem is the 00 wire or it s connections to the control box or to the master relay. SEE: MP.0K or MP.0 or MP.0 CONTOL OX - - LOCTION ND DESCIPTION DUMP CX TVEL CX MP.J c. If terminal has no power, the problem is the battery cable from the battery supply or it s connections to the battery supply or to the master relay. SEE: MP.0 or MP.0K or MP.0 d. If terminals and have power, check terminal for ground. If ground is not present, the problem is the white ground wire or it s connections to the ground stud or to the master relay. SEE: MP.0 or MP.0K or MP.0 LEVELING MNIFOLD ND S WITH PILOT I DUMP e. If terminals and have power and terminal has a ground, check terminal for power. If there is no power on terminal, replace the master relay. SEE: MP.0 or MP.0K or MP.0 f. If terminals, and have power, check terminal. If terminal has no power, the problem is the short cable between terminals and or it s connection to these terminals. SEE: MP.0 or MP.0K or MP.0 g. If terminal has power, check terminal for power. If terminal has no power, the problem is the 00 wire or it s connections to the control box or to the pump relay. SEE: MP.0 or MP.0K or MP.0 h. If terminal has power, check terminal for ground. If a ground is not present, the problem is the white ground wire or it s connections to the ground stud or to the pump relay. SEE: MP.0 or MP.0K or MP.0 i. If terminal has power and terminal has a ground, check terminal for power. If terminal does not have power, replace the pump relay. SEE: MP.0 or MP.0K or MP.0 j. If terminal has power, check terminal 9 on the pump motor. If terminal 9 has no power, the problem is the short cable between the pump relay and the pump motor or it s connections. If terminal 9 has power, make sure the power unit assembly has a good frame mounting. The pump motor is internally grounded and the mounting of the assembly supplies the ground for the motor. Make sure the stud on the pump motor is tight. If all connections, mountings and wires are OK, replace the pump motor. SEE: MP.0 or MP.0K or MP.0. The pump runs erratically or slowly. eview number of PT. (This section) MP.0 MI9. 0SEP0